Comparison of Noise Levels for Water Vapor Radiometers and the Troposphere
Abstract
The Jet Propulsion Lab (JPL) has been appointed as NASA's
division for unmanned space flight. Research in Very Long Baseline
Interferometry (VLBI) is one aspect important to JPL. One of the
largest error sources for work in VLBI is the path delay error caused
by water vapor present in the troposphere. Generally, a water vapor
radiometer (WVR) is used to measure the effect of the water vapor
to improve measurements in VLBI. My project was to make a
comparison of water vapor radiometers and to determine over what
time periods the water vapor radiometers should be used.